It's working its way into a fic I'm writing right now, so, spoilers for someone's fandom-stocking gift (not specifically yours or melannen's).
Because the systems work differently, and because only the YW!magic requires an oath of allegiance to someone other than, say, your king. And also because "maximally decrease entropy as much as possible" won't end all life just yet on the scale it's actually possible to do, but to want a world that has anything other than all the atoms of each type separated from each other into perfectly pure substances, and all the heat clustered together in one part of the universe never leaking out into the rest of it, requires having an allegiance to something other than the opposite of entropy. And remember that the Lone Power offers greatness before the fall.
Which all boils down to an initial official prohibition forcing YW!wizardry underground, and then keeping it that way by custom and fear even long after the reason for the initial prohibition is forgotten.
no subject
It's working its way into a fic I'm writing right now, so, spoilers for someone's fandom-stocking gift (not specifically yours or melannen's).
Because the systems work differently, and because only the YW!magic requires an oath of allegiance to someone other than, say, your king. And also because "maximally decrease entropy as much as possible" won't end all life just yet on the scale it's actually possible to do, but to want a world that has anything other than all the atoms of each type separated from each other into perfectly pure substances, and all the heat clustered together in one part of the universe never leaking out into the rest of it, requires having an allegiance to something other than the opposite of entropy. And remember that the Lone Power offers greatness before the fall.
Which all boils down to an initial official prohibition forcing YW!wizardry underground, and then keeping it that way by custom and fear even long after the reason for the initial prohibition is forgotten.